TacFire A2 .308 Stock Kit is a complete fixed-stock assembly optimized for .308 Winchester / 7.62x51mm AR-10 and AR-308 lower receivers. Constructed from durable, impact-resistant black polymer, the entire kit weighs 25.70 oz. The stock features a hinged butt plate that opens to an internal storage compartment. Included are a rifle-length extension tube, .308 A2 buffer, buffer spring, spacer, and screw. Safety Note Follow all manufacturer installation instructions. Verify proper function and secure mounting before use. Comply with local firearm laws and regulations.